var dom_level_2 = 
	(document.implementation && document.implementation.hasFeature("XHTML","2.0"));

var ie6 =
	/MSIE 6/.test(navigator.userAgent);

var ie7 =
	/MSIE 7/.test(navigator.userAgent);

var ie8 =
	/MSIE 8/.test(navigator.userAgent);

var nice_browser = dom_level_2 || ie7 || ie8;